Abstract
Fast Fe(Ⅲ)/Fe(Ⅱ)circulation in heterogeneous peroxymonosulfate(PMS)activation remains as a bottle-neck issue that restricts the development of PMS based advanced oxidation processes.Herein,we pro-posed a facile ammonia reduction strategy and synthesized a novel FeVO3-x catalysts to activate PMS for the degradation of a typical pharmaceutical,carbamazepine(CBZ).Rapid CBZ removal could be achieved within 10 min,which outperforms most of the other iron or vanadium-based catalysts.Electron para-magnetic resonance analysis and chemical probe experiments revealed SO4·-,·OH,O2·-and high valent iron(Fe(Ⅳ))were all generated in this system,but SO4·-and Fe(Ⅳ)primarily contributed to the degrada-tion of CBZ.Besides,X-ray photoelectron spectroscopy and X-ray adsorption spectroscopy indicated that both the generated low-valent V provides and oxygen vacancy acted as superior electron donors and ac-celerated internal electron transfer via the unsaturated V-O-Fe bond.Finally,the proposed system also exhibited satisfactory performance in practical applications.This work provides a promising platform in heterogeneous PMS activation.
基金项目
Shanghai Tongji Gao Tingyao Environmental Science and Technology Development Foundation()
国家自然科学基金(52070133)
国家自然科学基金(2022NSFSC0972)
Sichuan science and Technology Program:Key Research and Development Program(2019YFG0314)
Sichuan science and Technology Program:Key Research and Development Program(2017SZ0180)
Sichuan science and Technology Program:Key Research and Development Program(2019YFG0324)
NETL
NSTL
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